Creating random array from JSON data

Question

I have a function in which I want to pass to it an array of random numbers from 0 to 3, which would then correlate to then number of JSON objects I have stored. What I ultimately want to do is create an array in which these four JSON objects used to fill a 60 element array, in a random order. My problem so far is that the json_decode is returning null, so I can't proceed any further. I ran json_last_error and it returned 4, which I believe points to a syntax error, but I can't figure it out. Any ideas?

my function:

public function createSpatialKey($random_array){

    $test = array();
    $image_array = file_get_contents('files/memory_key.json');

    $image_array = json_decode($image_array, true);
    print_r($image_array); 

    $type = json_last_error();

    echo $type;

    foreach($random_array as $question){
      array_push($test, $image_array[$question]);
    } 

    return $test;
}

My JSON data:

[
  {
    "image": "<div id='spatial_location1'>1</div>",
    "answer": 1,
    "stimulus_id": 1,
  },
  {
    "image": "<div id='spatial_location2'>2</div>",
    "answer": 2,
    "stimulus_id": 2,
  },
  etc... 
]

There is an extra comma after the "stimulus_id" entry that renders the JSON invalid. — SaschaM78
– SaschaM78, Commented Apr 27, 2015 at 16:10
I can't believe I stared at this for an hour, and I completely missed that. Thank you for your sharp eyes! — jldavis76
– jldavis76, Commented Apr 27, 2015 at 16:15
Great that solved it! I added my answer below, thanks for accepting! — SaschaM78
– SaschaM78, Commented Apr 27, 2015 at 16:20

SaschaM78 · Accepted Answer · 2015-04-27 16:19:02Z

1

There is an extra comma after the "stimulus_id" entry that renders the JSON invalid. And I know what you are talking about :-)

answered Apr 27, 2015 at 16:19

SaschaM78

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